includes/SpecialDoubleRedirects.php

   1 <?php
   2 /**
   3  *
   4  * @package MediaWiki
   5  * @subpackage SpecialPage
   6  */
   7
   8 /**
   9  *
  10  */
  11 require_once('QueryPage.php');
  12
  13 /**
  14  *
  15  * @package MediaWiki
  16  * @subpackage SpecialPage
  17  */
  18 class DoubleRedirectsPage extends PageQueryPage {
  19
  20         function getName() {
  21                 return 'DoubleRedirects';
  22         }
  23
  24         function isExpensive( ) { return true; }
  25         function isSyndicated() { return false; }
  26
  27         function getPageHeader( ) {
  28                 #FIXME : probably need to add a backlink to the maintenance page.
  29                 return '<p>'.wfMsg("doubleredirectstext")."</p><br />\n";
  30         }
  31
  32         function getSQL() {
  33                 $dbr =& wfGetDB( DB_SLAVE );
  34                 extract( $dbr->tableNames( 'page', 'links' ) );
  35
  36                 $sql = "SELECT 'DoubleRedirects' as type," .
  37                          " pa.page_namespace as namespace, pa.page_title as title," .
  38                              " pb.page_namespace as nsb, pb.page_title as tb," .
  39                                  " pc.page_namespace as nsc, pc.page_title as tc" .
  40                            " FROM $links AS la, $links AS lb, $page AS pa, $page AS pb, $page AS pc" .
  41                            " WHERE pa.page_is_redirect=1 AND pb.page_is_redirect=1" .
  42                              " AND la.l_from=pa.page_id" .
  43                                  " AND la.l_to=pb.page_id" .
  44                                  " AND lb.l_from=pb.page_id" .
  45                                  " AND lb.l_to=pc.page_id";
  46                 return $sql;
  47         }
  48
  49         function getOrder() {
  50                 return '';
  51         }
  52
  53         function formatResult( $skin, $result ) {
  54                 $fname = 'DoubleRedirectsPage::formatResult';
  55                 $titleA = Title::makeTitle( $result->namespace, $result->title );
  56
  57                 if ( $result && !isset( $result->nsb ) ) {
  58                         $dbr =& wfGetDB( DB_SLAVE );
  59                         extract( $dbr->tableNames( 'page', 'links' ) );
  60                         $encTitle = $dbr->addQuotes( $result->title );
  61
  62                         $sql = "SELECT pa.page_namespace as namespace, pa.page_title as title," .
  63                                          " pb.page_namespace as nsb, pb.page_title as tb," .
  64                                          " pc.page_namespace as nsc, pc.page_title as tc" .
  65                                    " FROM $links AS la, $links AS lb, $page AS pa, $page AS pb, $page AS pc" .
  66                                    " WHERE pa.page_is_redirect=1 AND pb.page_is_redirect=1" .
  67                                          " AND la.l_from=pa.page_id" .
  68                                          " AND la.l_to=pb.page_id" .
  69                                          " AND lb.l_from=pb.page_id" .
  70                                          " AND lb.l_to=pc.page_id" .
  71                                          " AND pa.page_namespace={$result->namespace}" .
  72                                          " AND pa.page_title=$encTitle";
  73                         $res = $dbr->query( $sql, $fname );
  74                         if ( $res ) {
  75                                 $result = $dbr->fetchObject( $res );
  76                         }
  77                 }
  78                 if ( !$result ) {
  79                         return '';
  80                 }
  81
  82                 $titleB = Title::makeTitle( $result->nsb, $result->tb );
  83                 $titleC = Title::makeTitle( $result->nsc, $result->tc );
  84
  85                 $linkA = $skin->makeKnownLinkObj( $titleA,'', 'redirect=no' );
  86                 $edit = $skin->makeBrokenLinkObj( $titleA, "(".wfMsg("qbedit").")" , 'redirect=no');
  87                 $linkB = $skin->makeKnownLinkObj( $titleB, '', 'redirect=no' );
  88                 $linkC = $skin->makeKnownLinkObj( $titleC );
  89
  90                 return "$linkA $edit &rarr; $linkB &rarr; $linkC";
  91         }
  92 }
  93
  94 /**
  95  * constructor
  96  */
  97 function wfSpecialDoubleRedirects() {
  98         list( $limit, $offset ) = wfCheckLimits();
  99
 100         $sdr = new DoubleRedirectsPage();
 101
 102         return $sdr->doQuery( $offset, $limit );
 103
 104 }
 105 ?>